77 

 

Throttle valve opening abnormal 

Adjust

Engine with insufficient 
power 

Clean or replace 

Air filter blocked 

Intake system leaking 

Repair leaks 

Improper ignition timing 

Throttle valve position sensor 
malfunction 

Adjust or replace

Adjust advance angle of initial 
ignition 

Fuel pressure too 
low 

Repair

Remove, clean oil 
ejector 

Replace oil injector 

Replace cooling liquid 
temperature sensor 

Battery voltage too 
low 

Check charging system or replace 
battery 

Cooling liquid temperature 
sensor malfunction 

Intake manifold pressure temperature 
sensor malfunction 

Replace intake manifold pressure 

Replace ECU contrast test 

Replace ECU

Compression pressure of 
cylinder too low 

Remove and repair engine 

No changes 

Unusual 

Normal 

Normal 

Normal 

Normal 

Normal 

Normal 

Normal 

Normal 

Normal 

Normal 

Changes

Unusual 

Abnormal 

Abnormal 

Abnormal 

Too low 

Abnormal

Unusual

Unusual

Leaking 

Blocked

 
 

 

 

78 

 
No. 046 Oil consumption too large   

Malfunction Causes 

Solution 

Driving habit problem 

Also the most common problem. The counselor shall explain to the 
customer patiently and nicely, using euphemism;     

Oxygen sensor malfunction   

Check oxygen sensor could correctly identify concentration of gas mixture; 
if not, it will cause high oil consumption;   

Clearance of spark plug too 
large  

Clearance of spark plug is too large, causing poor ignition, which is one of 
reasons causing high oil consumption;   

Improper ignition timing   

Check ignition timing; when the engine is at idling speed, ignition advance 
angle shall be 10º~12º; if not correct, it may cause rising oil consumption; 
adjust ignition advance angle of the engine;   

Oil injector blocked or poor 
sealing  

Remove oil injector; check ejecting amounts and sealing are normal; if not, 
clean or replace oil injector;   

Cylinder poorly operating   

Check cylinder pressure, valve, etc. If individual cylinders are not working, 
repair it accordingly; replace or adjust parts causing unusual working;   

Cooling liquid temperature 
sensor malfunction 

Check cooling liquid temperature sensor. Resistance of this sensor could be 
changed according to specified standard under different temperatures; if 
not, replace this sensor; 

Air filter blocked 

Check air filter is blocked; if so, it may cause poor intake and large oil 
consumption; clean or repair it;   

Poor fuel quality   

Fuel with poor quality may cause this malfunction; recommend the 
customer to replace it at filling station that he often uses;   

Tire obviously worn or 
pressure severely insufficient   

Tire will cause increased friction force, balancing out partial engine power, 
causing increased oil consumption;   

Clutch slipping   

With sudden acceleration, speed counter of the engine is quickly increased, 
but the vehicle speed is very slowly increased, which could be judged that 
the clutch is slipping, causing idle running and increased oil consumption; 
replace clutch pressure plate and driven disk;   

Temperature control system 
malfunction causing large oil 
consumption  

For carburetor vehicle in old Geely model, the following malfunctions may 
occur: temperature control switch and thermostat are damaged, causing 
increased oil consumption as these damages will cause reduced water 
temperature, and carburetor cold not work normally, causing poor gasoline 
atomization and obviously increased oil consumption; replace it;   

Fuel pipe leaking   

Check fuel pipe; replace leaking pipe;   

Braking seizing 

Adjust front and rear braking; if necessary, burnish brake disk;   

Oil tank cover not well sealed  Poor sealing causes fuel evaporation;   

Canister control non-return 
valve damaged   

Replace it; 

During using, oil 
consumption of the 
engine is a lot 
higher than 
standard value 

Inlet pressure and 
temperature sensor damaged 

Intake quantity not conforming to standard values, causing error control, 
and high oil consumption when the vehicle is driving; check it with computer 
diagnosis instrument; if necessary, replace inlet pressure sensor;   

Throttle valve position sensor 
with broken circuit   

Unable to identify opening; replace sensor; 

Three-way catalyzer blocked   

Cementing within three-way catalyze blocked, with poor exhaust, causing 
high oil consumption; replace it;   

Inlet pipe leaking   

Replace inlet pipe;   

Individual cylinders not 
working  

Check operations of each cylinder; if individual cylinders are poorly 
operating, mainly check spark plug, high tension line, cylinder pressure, etc. 
Confirm causes and repair or replace;   

Incorrect valve timing of the 
engine 

Check valve timing is correct; if not, adjust it;   

Cylinder pressure too low   

Measure compression pressure of engine cylinder; if too low, check valve 
clearance or remove and repair engine;   

 

Idling speed too large or too  Eliminate  one  by  one according to idling speed-related malfunction 

 
 

 

 

79 

small   

template, making idling speed reach normal state;   

Water temperature abnormal   

Eliminate one by one according to water temperature-related malfunction 
template, making water temperature reach normal state; 

 

 
 

 

 

80 

 

Drive correctly 

Oil consumption too 
high 

Driving habit problem 

Oxygen sensor 
malfunction 

Clearance of spark plug too 
large 

Improper ignition timing 

Oil ejector obstructed or poor sealing

Cylinder poorly operating 

Clean

Repair

Replac
e

Check and 
adjust

Adjust

Normal 

Poor sealing

Normal 

Normal 

Normal 

Normal 

Improper

Too large

Abnormal

Habit problem

Repair